corona - How to do a "transition.to" to a value -

so here problem,

i want use easing algorithm of transition.to function have smooth transition of physics time step when game lost.

so far i've set value 1/300:

physics.settimestep(1/300) 

it's been 2 days of useless searching efforts..

i tried lot of things relevant.. not know whether or not possible..

thanks!

well after 3 days of searching found on github :

robert penner's easing library lua port

hoping else ! ;)